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Exploring the effect of the micropore on the microstructure development of low water-cement ratio composite (LW/B-CC) subjected to microwave pre-curing.
- Source :
-
Construction & Building Materials . Feb2024, Vol. 416, pN.PAG-N.PAG. 1p. - Publication Year :
- 2024
-
Abstract
- Microwave pre-curing, as an energy-saving and efficient pre-curing method, is employed and further optimized to produce low water-cement ratio composite (LW/B-CC) in this study. Theoretically, by replacing part of the coarse sand with porous zeolite sand, the potential stress concentration induced by microwave pre-curing and the crack risk in LW/B-CC can be reduced, which is beneficial for promoting the application of microwave curing strategy in practice. The obtained results show that the addition of zeolite can indeed achieve a win-win situation for early and late strength. This is the combined effect of space and time, working together in a four-dimensional (4-D) perspective: in space, Zeolite balanced the temperature difference at different positions of the sample during microwave treatment, reducing cracks caused by differences in thermal expansion coefficients of the matrix; in time, Zeolite reduces the porosity by extending the migration rate of water molecules to large pores and the water molecule backflow during microwave pre-curing. Finally, based on the proposed new idea in this study, the microstructure of LW/B-CC can be well optimized during microwave curing process. [Display omitted] • The possibility of optimizing microwave pre-curing on LW/B-CC is explored. • The spatial and temporal motion of water molecules during microwave pre-curing is studied. • The addition of zeolite is conducive to the formation of LW/B-CC microstructures. [ABSTRACT FROM AUTHOR]
- Subjects :
- *MICROWAVES
*STRESS concentration
*MICROSTRUCTURE
*PORE water
*THERMAL expansion
Subjects
Details
- Language :
- English
- ISSN :
- 09500618
- Volume :
- 416
- Database :
- Academic Search Index
- Journal :
- Construction & Building Materials
- Publication Type :
- Academic Journal
- Accession number :
- 175363788
- Full Text :
- https://doi.org/10.1016/j.conbuildmat.2024.135141